Samuel fiske



(No Model.)

S. PISKE;

STEAM GENERATOR.

No. 361,216. PatefitedAprLlZ, 1887.

' WITNESSES:

Wix w.

' In? ATTORNEY N. PETERS. Fhnlu-Ulhngraphur. wmm mn lic UNITED STATES PATENT OFFICE.

SAMUEL FISKE, OF NEW YORK, N. Y.

STEAM-GENERATOR.

, SPECIFICATION forming part of Letters Patent No. 361,216, dated April 12, 1887.

Application filed January 4, 1887. Serial No. 223,357. (No model.)

To all whom it may concern.-

Be it known that I, SAMUEL FIsKE, of New York, county of New York, and State of New York, have invented certain new and useful Improvements in Steam-Generators, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, and to the letters of reference marked thereon.

This invention is designed as an improvement on the steam-generator for which Letters Patent of the United States, No. 326,552, were issued to me September 22, 1885.

The objects of this invention are to secure greater economy and convenience of construction, more extended heating-surface in a given space, and economy in fuel.

Reference is to be had to the accompanying drawings, forming part of this specification, in which similar letters of reference indicate corresponding parts in all the figures.

Figure lis a frontelevation of theimproved steam-generator. Fig. 2 is a sectional elevation thereof. Fig. 3 is a plan on line 3 3 Fig. 2. Fig. 4 is a plan on line x m, Fig. 2.

'[n the drawings, A represents the generatorbase, whose front, provided withdoors A, is secured in place by screws, as shown, and is removable, so that the grate Bmay be readily set in place or removed through the opening.

The grate B herein shown is centrally supported by a spindle that is held in a standard which projects upward from the base bottom; but a grate of any suitable form may be used.

The main portion of the boiler 0, supported on the base A, has, for most of its height, a double shell, a a, inclosing a water-space, b, which at the-sides surrounds the combustionchamber 1), and at the top extends over it, the inner shell, a, being of less height than the outer shell, a. The bottom of this annular water-space b is closed by a ring, d, to which the lower edges of said shells are riveted. A door, E, in one side of the boiler affords access to the combustion-chamber for feeding fuel thereto.

The boiler-cover is a plate, A suitably secured to the upper edge of the outer boilershell, a, and over a central opening in said cover A is fixed the smoke-pipe a which coincides with the opening in the enlarged conical smoke-box F beneath the boiler-cover.

cylindrical body of the smoke-box curves inward at the sides a short distance up in the boiler water-space, and then flares outward, as shown, to form inclined planes for the easy introduction and connection therewith of the inclined smoke and hot-air flues F (Shown best in Fig. 2.) Through these flues F the products of combustion pass from theannular flue H, hereinafter described, into the said smoke-box.

The top of the smoke-box Fis partly closed by an annular cover, a, which is an integral part thereof, and rivets a passed through the boiler-cover, and the edge of this cover a, se cure the smoke-box in place.

The outer radiating surface of the smokebox' may be extended or increased by projecting ribs a or studs (6 cast or secured thereon, as shown in dotted lines in Fig. 2, and the device itself be thereby very considerably strengthened. I

A large annular doubleshelled water-drum, G, suitably secured by the inclined top flange, g, of its outer shell to the inner shell, (1, of the main portion of the boiler and by the upper edge of its inner shell to the annular flangef of the smoke-box F, projects down into the combustion-chamber D in such a manner that an annular flue, H, for the upward passage of the products of combustion, is formed between it and the main body of the boiler, and this flue H is connected with the smoke-box F by means of the several shorter flues F which pass angularly through the upper water-space, each of the flues F having one end expanded or otherwise secured in the inclined flange g, and at right angles thereto, of the outer shell of the drum G, as shown in Fig. 2. This drum G, being open at the top below the water-line z, communicates there with the water-space 'of the main body of the boiler, and also by means of two or more tubes, I, which extend lCO laterally from the lower part of said drum to the water-space 1). Within the space incloscd by the inner shell of this drum G is a smaller water-cylinder, K, which preferably extends down into the combustioachamber as far as does the drum G, and so forms an annular flue, L, between it and the said drum G. The top of this cylinder K is made conical, to increase the area of the flue L, at the upper part thereof, in order to give the products of combustion freer passage into the smoke-box F.

The cylinder K is held in place by a tubeconnection, Z, at its top with a horizontal tube, Z, which extends across the smoke-box F and through its opposite sides, as indicated in Figs. 2 and 3, and communicates with the upper water-chamber; and the water-space of said cylinder K communicates, also,with the watersaid flange were a horizontal one.

space of the drum G by means of a tube or tubes, at, extending from the one to the other, as shown.

In a steam-generator of this style of con struction an unusually extensive water-heating surface is secured. The inclined top flange of the water-drum Gthe cover of the annular flue Hadmits of the use of cylindrical fines F of greater crosssectional area than if The smokebox being placed in the water and steam space, receives all the products of combustion escaping from the combustion-chamber and economizes the heat in them to the greatest possible degree by radiating it from its extended surface on all sides, and the circulation of water from one division of the water-space to another is as free as can be desired, and the several parts of the generator are simple and easy of construction, are easily assembled, and can readily be renewed or repaired.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- 1. A steam-generator constructed, substantially as herein shown and described,with outer and inner shells, a a, forming an annular water leg or space encircling the combustionchamber, smokebox F, fixed centrally in the upper part of the generator in the water and steam chambers, annular open-top water-drum G, projecting down into the combustion-chamher and forming, in connection with the shell a, an annular flue, H, opentop water-cylinder K, projecting down into the combustion-chamher in the space inclosed by the inner shell of the drum G, and forming, in connection with the shell, an annular flue, L, suitable flue-connections from the annular fines to the smoke-box, and suitable water-connections from one waterspace to another, all constructed and arranged substantially as herein shown and described.

2. In a steam-generator, the combination, 6c with the boiler provided with annular flue H, of a conical smoke-box secured entirely within the water and steam chambers and constructed and arranged to receive the products of combustion passing from the combustion-chamber to the smoke'pipe, and the inclined flues F connecting said combustion chamber and smoke-box, substantially as and for the purpose set forth.

3. The combination, with the shorter inner shell, (1, arranged in relation to the outer shell, a, to form an annular water leg or space, I), of the annular waterdrum G, secured by the inclined flanged top of its outer shell to the top of the shell a and by the upper edge of its inner shell to the smoke-box F, and projecting down into thecombustionchamber, as set forth.

4. The combination, with the smoke-box F, set centrally in the upper part of the steamgenerator, and with the open-top annular water-drum G, of the open-top water-cylinder K, projecting down into the combustion-chamber within the space inclosed by the inner shell of the drum G and provided with water-connections with the boiler water-spaces, substantially as herein shown and described.

5. In a steamgenerator, the combination of an annular outer open-top watcr'leg, a central water-cylinder, and an intermediate conical annular open'top water-leg, together forming annular fines in the upper part of the combustion-chamber, substantially as herein shown and described. i i l l i i i 6. The combination,with annular line H and annular watendrum G, having the upper edge of its outer shell flanged orflared outward and upward on an incline, of inclined tubular flues F, secured at one end in said inclined flange and projecting at right angles therefrom, substantially as herein shown and described.

7. In a steam-generator of the character substantially as herein specified, provided with an annular line as a means for securing space for tubular flues of large area to conduct the products of combustion from said annular flue, the top flange of the water drum G, fixed at a slope or inclination, as set forth.

In testimony that I claim the foregoing I have hereunto set my hand, in the presence of two witnesses, this 31st day of December, 1886.

SAMUEL FISKE.

\Vitnesses:

JACOB J. S'roREn, I'IERBERT VALENTINE. 

